Hello there!
When you vertically compress a quadratic equation, you are changing the y-value by making the graph appear more flat, which is why it is called a "vertical compression".
When making a vertical compression in an equation, you are performing:
b(f(x)) where b represents the value of compression.
When written this way to vertically compress the parent function, f(x)=x^2, you would write it as:
f(x)=1/4x^2 which would be your answer.